# Knock Knock vs Camera Detector

The clearest difference is in-app purchases: Knock Knock at none against Camera Detector's 2. Knock Knock also leads on ads (none vs shown) and device support (3 vs 1). On price and update cadence there is nothing between them.

Both are free to download. Camera Detector sells 2 in-app purchases, starting at $8.99 per 7 days. Knock Knock asks for nothing beyond the download.

Knock Knock ships an update every 5 days, Camera Detector weekly. The most recent releases landed on October 8, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Knock Knock | Camera Detector |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (235 ratings)](https://appshunter.io/ios/app/camera-detector-bug-tracker/id6749680030/reviews)** |
| Number of ratings | — | **235** |
| Positive reviews | — | 20.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 5 days** | Weekly |
| Monetization | — | Free with in-app purchases |
| Size | 42 MB | 125 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Sarjan Patel](https://appshunter.io/developer/1817590129) | [Camera Finder](https://appshunter.io/developer/1831721247) |

## What reviewers say

### Knock Knock

[App page](https://appshunter.io/ios/app/knock-knock-gated-security/id6746636097)

**Features:** macOS Compatibility

**In-app purchases:** none


### Camera Detector

[App page](https://appshunter.io/ios/app/camera-detector-bug-tracker/id6749680030)

This app acts as a personal security assistant, helping you check for email data breaches and test your Wi-Fi speed. It provides actionable advice on online safety and privacy settings, all presented without technical jargon.

**Highlights:** Mail breach checker, Data leak detection, Wi-Fi speed tester, Online safety tips, Privacy setting guidance

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| My Device Scanner for 1 Week | $8.99 | per 7 days |
| My Device Scanner for 1 Month | $29.99 | per month |


## Frequently asked questions

### Is Knock Knock free?

Knock Knock is free to download, with no in-app purchases.

### Is Camera Detector free?

Camera Detector is free to download, with in-app purchases available.

### Do Knock Knock or Camera Detector have ads?

Camera Detector shows ads; Knock Knock does not.

### Which is updated more often, Knock Knock or Camera Detector?

Knock Knock ships an update every 5 days, and Camera Detector weekly. Most recently, Knock Knock was updated on October 8, 2026 and Camera Detector on October 15, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*